Patents by Inventor R. Bruce Sampsell

R. Bruce Sampsell has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Foundry sand mixes with improved bench life for curing with sulfur dioxide or other oxidizable gaseous catalysts
    Patent number: 4308191
    Abstract: Foundry sand mixes comprising a mixture of sand, binder, and hydrogen peroxide are improved with respect to bench life by the addition thereto, at the time of initial preparation of the mixture, of non-catalyzing amounts, but stabilizing amounts, of certain iron chelating agents which are acid or salts of acids selected from those which, in their free acid form, have an acidic pH less than 3.0 when dissolved at 1 percent weight per weight in water or when saturated in water, whichever is lower in concentration.
    Type: Grant
    Filed: February 25, 1980
    Date of Patent: December 29, 1981
    Assignee: The Quaker Oats Company
    Inventors: Robert H. Fox, Roger H. Kottke, James E. Menting, R. Bruce Sampsell